_/proc/stat vs /proc/uptime

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LEARN ABOUT REDHAT

mpstat

MPSTAT(1)							Linux User's Manual							 MPSTAT(1)

NAME

       mpstat - Report processors related statistics.

SYNOPSIS

       mpstat [ -P { cpu | ALL } ] [ -V ] [ interval [ count ] ]

DESCRIPTION

       The  mpstat  command  writes  to  standard output activities for each available processor, processor 0 being the first one.  Global average
       activities among all processors are also reported.  The mpstat command can be used both on SMP and UP machines, but  in	the  latter,  only
       global average activities will be printed.

       The  interval parameter specifies the amount of time in seconds between each report.  A value of 0 indicates that processors statistics are
       to be reported for the time since system startup (boot).  The count parameter can be specified in conjunction with the  interval  parameter
       if  this  one  is not set to zero. The value of count determines the number of reports generated at interval seconds apart. If the interval
       parameter is specified without the count parameter, the mpstat command generates reports continuously.

REPORTS

       The report generated by the mpstat command has the following format:

       CPU
	      Processor number. The keyword all indicates that statistics are calculated as averages among all processors.
       %user
	      Show the percentage of CPU utilization that occurred while executing at the user level (application).
       %nice
	      Show the percentage of CPU utilization that occurred while executing at the user level with nice priority.
       %system
	      Show the percentage of CPU utilization that occurred while executing at the system level (kernel).
       %idle
	      Show the percentage of time that the CPU or CPUs were idle.
       intr/s
	      Show the total number of interrupts received per second by the CPU or CPUs.

OPTIONS

       -P cpu | ALL
	      Indicate the processor number for which statistics are to be reported.  cpu is the processor number. Note that processor	0  is  the
	      first processor.	The ALL keyword indicates that statistics are to be reported for all processors.

       -V     Print version number and usage then exit.

ENVIRONMENT

       The mpstat command takes into account the following environment variable:

       S_TIME_FORMAT
	      If  this	variable  exists and its value is ISO then the current locale will be ignored when printing the date in the report header.
	      The mpstat command will use the ISO format (YYYY-MM-DD) instead.

EXAMPLES

       mpstat 2 5
	      Display five reports of global statistics among all processors at two second intervals.

       mpstat -P ALL 2 5
	      Display five reports of statistics for all processors at two second intervals.

BUGS

       /proc filesystem must be mounted for the mpstat command to work.

       Only a few activities are supplied by the Linux kernel for each processor.

FILES

       /proc contains various files with system statistics.

AUTHOR

       Sebastien Godard <sebastien.godard@wanadoo.fr>

SEE ALSO

       sar(1), sadc(8), sa1(8), sa2(8), iostat(1), vmstat(8)

       http://perso.wanadoo.fr/sebastien.godard/

Linux								     MAY 2000								 MPSTAT(1)

UNIX for Dummies Questions & Answers